"""
题目2：画出下面代码每一行的引用情况
def test(num):
	num = num + 1
    result = "hello"
    return result
a = 10
r = test(a)


"""

"""
1。a指向10
2。num指向10
3。num指向11
4。result指向字符串"hello"
5。函数返回result的结果，赋给r，r指向字符串"result"


"""
